Revert of [Android] Add a java.lang.System wrapper.

base/android/java_system.cc

-// Copyright (c) 2015 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#include "base/android/java_system.h"
-
-#include "base/android/jni_string.h"
-#include "jni/System_jni.h"
-
-namespace base {
-namespace android {
-
-bool JavaSystem::Register(JNIEnv* env) {
-  return JNI_System::RegisterNativesImpl(env);
-}
-
-// static
-std::string JavaSystem::GetProperty(const base::StringPiece& property_name) {
-  DCHECK(!property_name.empty());
-  JNIEnv* env = AttachCurrentThread();
-  ScopedJavaLocalRef<jstring> jproperty_name =
-      ConvertUTF8ToJavaString(env, property_name);
-  ScopedJavaLocalRef<jstring> jproperty =
-      JNI_System::Java_System_getPropertyJLS_JLS(env, jproperty_name.obj());
-  return jproperty.is_null() ? std::string()
-                             : ConvertJavaStringToUTF8(env, jproperty.obj());
-}
-
-}  // namespace android
-}  // namespace base